CFD Online Discussion Forums - RP_variable for porous information

Hello

I am trying to access information about my porous media
I was wondering how to get the 'porosity' value in my udf?

I have tried stuff like:

por = RP_Get_Real("porosity");
por = RP_Get_Real("fluid-porosity");
etc...

but it does not seems such variable exits as a Fluent variable.
Does anyone knows how to access the list of Fluent variables?

I am trying to access such data in order to deal with a porous media only.
In an interpreted UDF, I am writing such loop (for example for the intialization) (let say I have 2 fluid threads and 1 solid thread, one fluid thread being porous):

Code:

DEFINE_INIT(init, d)



Thread *t;

cell_t c;



thread_loop_c(t,d)

    {

     if (NNULP(T_STORAGE_R(t,SV_P)  // to get the fluid threads

         

        // here I wish to get only the porous one, so that explain my above

        question: 

        if porosity = 1, etc....

 

     }

Alternatively, in a compiled UDF, I have wrote the following:

Code:

DEFINE_INIT(init, d)



real cporous;

Thread *t;

cell_t c;



thread_loop_c(t,d)

    {

     if (FLUID_THREAD_P(t) && THREAD_VAR(t).fluid.porous)

         {

          begin_c_loop(c,t)

              {

               cporous = cporous + 1;

               }

          end_c_loop(c,t)

         }



     }

but it seems this return the total amount of the fluid cells, both the fluid and the porous.
I do not really understand why the THREAD_Var(t).fuid.porous does not work in the compiled udf.
After several unfruitful tests, I decided to try the way by the interpreted udf (and then the problem on getting the porosity value came, as the THREAD_VAR can be used only in compiled udf).

Thank you for any hint on that problem